Co- and cross-polarizations for mine detection

Roshni J. Mehta-Sherbondy; Douglas P. Byrne

doi:10.1117/12.211314

20 June 1995 Co- and cross-polarizations for mine detection

Roshni J. Mehta-Sherbondy, Douglas P. Byrne

Proceedings Volume 2496, Detection Technologies for Mines and Minelike Targets; (1995) https://doi.org/10.1117/12.211314
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

Preliminary results have shown that cross polarization enhances mine detection capabilities. This paper contains data from experimental and simulated testing, analysis of the data, and conclusions on effects of polarization techniques for mine detection. Cross polarization of the transmit and receive antennas significantly diminishes the surface reflection integrated at the receive antenna. The angle of the transmit and receive antennas in a cross polarization configuration is inherently 90 degrees; at different azimuth angles, a contrast in the backscattered energy from a mine and from the air/ground interface above the mine has been observed. To further understand this phenomenon, Kaman Sciences has configured a bistatic, dipole, impulse system operating at 2.5 GHz center frequency. The transmitter and receiver are positioned at specific down-looking angles to the ground. The receiver is stepped around the azimuth of the transmitter for co- and cross-polarizations. The Kaman Sciences system and experimental data collection will be discussed in the paper. Specifically, Kaman Sciences collected data with both metallic and nonmetallic mine simulants or targets. The targets were placed on the surface and buried 2 inches in 3 different types of soils: sand, sand mixed with gravel, and loam-rich top soil. Free space measurements of mines were modelled using a method of moments code that was specifically modified to account for the ultra wideband nature of the transmitter waveform. The resulting data was analyzed for the optimum polarization angle according to the target and compared with experimental results. The paper will contain the experimental and model data, results, and conclusions with respect to the benefits to mine detection.

Citation Download Citation

Roshni J. Mehta-Sherbondy and Douglas P. Byrne "Co- and cross-polarizations for mine detection", Proc. SPIE 2496, Detection Technologies for Mines and Minelike Targets, (20 June 1995); https://doi.org/10.1117/12.211314

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KEYWORDS

Polarization

Mining

Antennas

Land mines

Data modeling

Dielectric polarization

Free space

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